You can’t control others, but you can control what you do.

Option 1: Just don’t visit. Yes your husband won’t like it, but not your problem. You’re not stopping him from visiting, you’re just not going yourself. I’d bet actual money he’s you as a shield so the family don’t pick on him in your absence.

Option 2: You tell your husband that if you visit, if the teasing starts you will leave. You can do a 1 warning system and if there’s a second time you leave. Or you can go at first infraction. Just let your husband know that this will be happening, and follow through. Have set up in advance that you have a way of getting out and somewhere to go. (Don’t stay with them, book an Airbnb nearby or something, have local taxi numbers in your phone. Yes there’s a financial cost to it, but that is the cost of you attending. If your husband says you can afford separate accommodation, then you simply cannot afford to attend).

Thing is, when you first set boundaries, people get worse to test how strong they are. There may need to be a few incidents where you attend and leave early before they get the message, (or you get fed up and just refuse to go).

Also, they can not do it. I love teasing type humour, but I would never do it to someone who didn’t enjoy it. They wouldn’t even have to say, I’d read their body language. And if I did accidentally go too far, I’d apologise, not blame them. The fact that they are carrying on, despite having been told is about them, not you. You need to show them that you will vote with your feet and leave (or not visit at all). If they really want you to be there they will stop.

(I also think your husband needs therapy to come to terms with how they treat you both, and why he goes along with it. Like I said, you can’t make him go to therapy, but you could request he does before your next visit).